IEEE Transactions on Audio and Electroacoustics

Issue 6 • December 1973

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Displaying Results 1 - 17 of 17
  • [Front cover and table of contents]

    Publication Year: 1973, Page(s): 0
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  • A new approach to the realization of nonrecursive digital filters

    Publication Year: 1973, Page(s):477 - 484
    Cited by:  Papers (56)  |  Patents (3)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (732 KB)

    A new realization of nonrecursive digital filters that are used to operate on analog signals is proposed. This realization requires no multiplications, and exploits the relative simplicity of delta modulation as a means for analog to digital conversion. This realization also permits a mechanization as a "very fast" digital filter, using read-only memory (ROM). An evaluation of this realization in ... View full abstract»

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  • New methods of digital ladder realization

    Publication Year: 1973, Page(s):485 - 491
    Cited by:  Papers (15)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (625 KB)

    Several new methods of realization of an arbitrary digital transfer function are proposed. The final realization is in the form of a two-input two-output digital filter configuration with one input variable constrained to be a multiple of one of the output variables. All realizations are canonic with respect to the delays but use different numbers of adders and multipliers. Examples illustrating t... View full abstract»

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  • Digital lattice and ladder filter synthesis

    Publication Year: 1973, Page(s):491 - 500
    Cited by:  Papers (239)  |  Patents (6)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (919 KB)

    There is evidence that in addition to standard digital filter forms such as the direct, parallel, and cascade forms, digital lattice and ladder filters may play an important role in finite word length implementation problems. In this paper, techniques are developed in detail for efficiently synthesizing digital lattice and ladder filters from any stable direct form. In one form, a lattice filter c... View full abstract»

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  • Considerations of the Padé approximant technique in the synthesis of recursive digital filters

    Publication Year: 1973, Page(s):500 - 505
    Cited by:  Papers (34)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (478 KB)

    The Padé approximant technique provides a quick design of recursive digital filters. An added advantage of the technique lies in that spectrum shaping requirements as well as linear phase constraints can be handled easily, even for higher order filters. This is important in supplying initial guesses of the filter parameters to iterative routines that would then seek a locally optimal design soluti... View full abstract»

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  • A computer program for designing optimum FIR linear phase digital filters

    Publication Year: 1973, Page(s):506 - 526
    Cited by:  Papers (795)  |  Patents (18)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (1161 KB)

    This paper presents a general-purpose computer program which is capable of designing a large Class of optimum (in the minimax sense) FIR linear phase digital filters. The program has options for designing such standard filters as low-pass, high-pass, bandpass, and bandstop filters, as well as multipassband-stopband filters, differentiators, and Hilbert transformers. The program can also be used to... View full abstract»

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  • Computer recognition of the continuant phonemes in connected english speech

    Publication Year: 1973, Page(s):526 - 535
    Cited by:  Papers (9)  |  Patents (3)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (1139 KB)

    A method of phoneme recognition of connected speech is described. Input to the system is assumed to consist of the 24 continuant phonemes in connected English speech. The system first categorizes each successive 20-ms segment of the input speech utterance as either voiced fricative, voiced nonfricative, unvoiced fricative or no-speech, Utilizing a measure of the relative energy balance between low... View full abstract»

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  • Interaction between segmental and nonsegmental factors in speech recognition

    Publication Year: 1973, Page(s):536 - 545
    Cited by:  Papers (7)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (1164 KB)

    The present study demonstrates that spectrograms of Swedish utterances can be read with great accuracy under nontrivial conditions. This result is to be attributed primarily to the development of a formalized strategy that was designed to make it possible for spectrogram readers to derive information on certain grammatical features of an utterance such as word class, word boundaries, endings, and ... View full abstract»

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  • An audio power amplifier for ultimate quality requirements

    Publication Year: 1973, Page(s):545 - 551
    Cited by:  Papers (3)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (800 KB)

    A 50 W/4 Ω complementary symmetry audio amplifier concept is described. The amplifier is designed to meet ultimate quality requirements with particular emphasis on lack of transient intermodulation distortion. Excellent phase and amplitude linearity is obtained using low feedback value, class A operation for most of the signal time, and a fully symmetric dc-coupled high frequency design. View full abstract»

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  • On the location of zeros and a reduction in the number of adds in a digital ladder structure

    Publication Year: 1973, Page(s):551 - 552
    Cited by:  Papers (6)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (187 KB)

    A modification is proposed in the design of digital ladder structures, which have transmission zeros. This results in a reduction in the number of adds required in the structure. The location of the transmission zeros under coefficient rounding is then analyzed. View full abstract»

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  • A simplified inverse z-transform expression

    Publication Year: 1973, Page(s):552 - 554
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (262 KB)

    An expression is developed here that simplifies determining the inverse z-transform of functions having nonrepeated complex conjugate poles. View full abstract»

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  • Comments on "Symmetry analysis: A generalization of finite Walsh-Fourier analysis"

    Publication Year: 1973, Page(s): 554
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (109 KB)

    In the above-mentioned correspondence there is a discrepancy between the tree development scheme used and the basis vectors given. This is pointed out and then corrected. View full abstract»

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  • Linear approximations to √x2+y2having equiripple error characteristics

    Publication Year: 1973, Page(s):554 - 556
    Cited by:  Papers (12)  |  Patents (1)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (244 KB)

    An equiripple error constraint was used to design linear approximations to\sqrt{x^{2} + y^{2}}. Several examples are presented including one having a peak error of less than one percent, which is significantly less than the error obtained by using other design criteria. The mean and standard deviation of the relative error are also tabulated as are earlier results obtained by other auth... View full abstract»

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  • Multiplication reduction in short-term autocorrelation

    Publication Year: 1973, Page(s):556 - 558
    Cited by:  Papers (7)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (310 KB)

    Expansion of the basic short-term autocorrelation equation into sum-of-products form shows that common factors occur in a predictable order. When the data are assumed to have zero value outside the interval of interest and the number of autocorrelation coefficients is much less than the number of data points, factoring can reduce the number of multiplications by up to 46 percent. View full abstract»

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  • A note on exact discrete Fourier transforms

    Publication Year: 1973, Page(s):558 - 559
    Cited by:  Papers (2)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (259 KB)

    It is proved that the z transform of a sequence of data values cannot be exactly computed using a binary number representation for values of z on the unit circle, except z =±1, z = ±j. It is also proved that the discrete Fourier transform (DFT) of a sequence of data values cannot be evaluated with rational numbers. View full abstract»

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  • Loudspeaker system figures of merit

    Publication Year: 1973, Page(s):559 - 560
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (206 KB)

    The loudspeaker system small-signal figure of merit is a useful performance criterion that must be evaluated and used with some care. In practice, this figure of merit is significantly reduced by enclosure dissipation, including that contributed by filling materials. View full abstract»

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  • [Back cover]

    Publication Year: 1973, Page(s): c4
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Aims & Scope

This Transactions ceased production in 1973. The current retitled publication is IEEE Transactions on Signal Processing.

Full Aims & Scope